#424F71
Closest named color: YInMn Blue (#415A77). oklch(43.1% 0.059 267.8), rgb(66, 79, 113).
Aa
White text reads best on this color (8.11:1).
About this color
#424F71 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.059 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.032 away. White text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #424F71 |
| RGB | rgb(66, 79, 113) |
| HSL | hsl(223, 26%, 35%) |
| OKLCH | oklch(43.1% 0.059 267.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #424F71 | 8.11:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #424F71 | 2.58:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #424F71 text on white | 8.11:1 | AAA | Lc 88.0 | Fine for body text |
| #424F71 text on black | 2.58:1 | Fails | Lc -14.1 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B7C0D8
oklch(80.8% 0.035 269.2)
-
Step 400
400
#92A0C4
oklch(70.7% 0.055 268.3)
-
Step 500
500
#7788B5
oklch(63% 0.071 268.3)
-
Step 600
600
#6072A1
oklch(55.7% 0.077 267.8)
-
Step 700
700
#4F5F8A
oklch(49.1% 0.072 268.1)
-
Step 800
800 (this color)
#424F71
oklch(43.1% 0.059 267.8)
-
Step 900
900
#37415A
oklch(37.7% 0.045 267.4)
-
Step 950
950
#202635
oklch(27% 0.029 267.5)
#424F71 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #435272 | 0.009 |
| Deuteranopia (no green cones) | #3F4E70 | 0.006 |
| Tritanopia (no blue cones) | #33565B | 0.053 |
| Achromatopsia (no color) | #505050 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424F71
#424F71
oklch(43.1% 0.059 267.8)
- #5E4E28
#5E4E28
oklch(43.1% 0.059 87)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #424F71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.032
- Dusk #4E5481 ΔE 0.034
- Dusty Grape #545775 ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.046
- Twilight #4E518B ΔE 0.047
- Light Navy #155084 ΔE 0.053
- Dusk Blue #26538D ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.055
Use #424F71 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.